So far, our database can't store anything because we've not created an object store. If you're familiar with tables or schemas from relational databases, these are somewhat similar. And, of course, before we can store any objects in them, we have to first create a place for them to be stored.
The only time you can modify the structure of your database is in the
onupgradeneeded handler. This handler is called whenever the database needs to be upgraded, which makes sense, but it's also called when the database is brand new.
In order to create an object store, we need to determine at least some of the properties we'll expect most objects to have. Although you can store any kind of objects you want with any ...